Nut lock



Patent hilary l,

To all whom naar 'nur Loon.

#application led June 21., 1922. Seriallto. 569,984.

it may concern Be it known that MATTHEW D. KIMBALL,

a citizen oit the United States, residin Omaha, in the county of Douglas and tate 5 of Nebraska, hasv invented certain new and useful lmprovements in Nut Locks, ofwhich the following is a specification.

The invention relates to nut locks and has for its object to provide a character wherein a device of this spring washer is utilized which washer is provided with a transversely disposed concavity adapted to receive a transversely disposed concaved side of the nut and hold said nut against accidental retrograde movement, other causes.'-

further object incident to vibration or is to provide the outer face of the washer adj acent the sides of the concavity thereof with depressions, wh1ch depressions receive the diagonal. corners of the nut upon an intermediatel position of the nut such for the nut,

A further object which will not become loose instance as quarter turn of from its locked position.

is to provide a lock nut under vibrations or other causes, which nut may be easily and quickly removed from a bolt and from the washer without damage thereto,

thereby allowing used again.

the nut and washer to be With the above and other objects in 'view the invention resides in the combination and arrangement of parts as hereinafter set forth shown in the drawing, claimed, it being understood that changes described and in the precise embodiment of the invention may be made within the scope of what is claimed without departing-from.

of the invention.

ln the drawing:

the spirit Figure l is a side .elevation -of the bolt showing the nut and washer applied thereto and the nut and w tightened.

Figure asher in condition to be 2 is a view in section showing the nut and washer tightened.

`Figure 3 is a side elevation ofthe nut.

Figure 4 is a perspective view of the spring washer. v

5 is a bottom plan view of the nut.

Figure Referring to the drawing the numeral l designates a conventional form of bolt and 2 the threaded shank thereof, said bolt being provided with a head 3. Disposed on the bolt is a spring and downwardly curved ends 9 'of thev washer 4. lt will be seen that. when the ends' of the washer engage for instance members 10 after being clamped together, the nut 8 cannot unscrew rom'the shank 2 unless a wrench is applied thereto and considerable power applied to the wrench. oweverit will be seen that when considerable power is applied to lthe nut 8, it may bei unscrewed and again used, however the'nut cannot unscrew under ordinary vibrations and from accidental reasons which are common in conventional forms of bolts and nuts.

The outer face of the washer 4 adjacent th'e sides of the concavity 6 is provided with depressions 11, which depressions receive the Y corners 12 of the nut when thenut is not in exact transverse position as shown in figure l. For instance if the nut is turned one quarter turn the corners 'l2 will be received in the depressions 11 of the spring washer' and' the nut held against retrograde movement.

From the above it will be seen that a locking device is provided for nuts, which is simple in construction, may be unscrewed if so desired lwithout injury tothe nut and one which may be cheaply constructed.

The invention having been set forth what is claimed as new and useful is-:-

l. The combination with shank of a bolt, a nutthreaded .on said threaded shank, of means for preventing retrograde movement of said nut after the same has been tightened, said means comprisn'g a spring washersaid spring washer being provided with a transversely disposed concavity,'the` inner side of said nut being provided with a. transversely disposed con;

sdsped tof engage e' surface whereby said Washer Wii be exed, l

2., A .'ioei :out eomplising a mit having e tmisveseiy disposed oonvexed side., said nut being `dlreeded on fthe shank of the boit., a spring Washer carried 'by seid shexii, said spring Washer being provided with a tra-:nsversely disposed eomcevity adapted to reeeive the eonvexed side of ehe nui9 4Mie ends of said Washer #amending outwei'diy, up- Wai'diy end downweidy sind adapted to engage an object for dexiog she Washer when 'the nui: is ightened.

3. The combination Wih e spring washer and lock mit, sei-d lock mit being provided with e transversely isposed conve-ized side eooperating with e tsiiveiseiy disposed coneavity in thewashei', o' means foi' holding said nut against retrogi-ede movement upon zi quarter turn of the out, seid means comprising depressions in the `sshei' adjacent the opposie sides of the conca-vi@ therein.

iin testimony whereof I aix my sigoauie.

MATTHW KMBALL. 

